Sound Fixes Pack v20.15 1.37

Description: v20.15 update for ATS 1.37 now available with the following change:1 new real engine (Detroit Diesel 6V92TA) + 1 new real idle sound for MCI MC-12 bus in AI traffic. Update v20.14 is now available with the following change: Applied speaker effect for English Skye US voice navigation for increased immersion.